<!DOCTYPE html>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
    <head>
        <title>播放约束测试</title>
    </head>
    <body>
        <div id="mainDiv">
           
            <p>播放约束测试</p>
            <div id="buttons">
                <button id="qvga">320x240</button>
                <button id="vga">640x480</button>
                <button id="hd">1280x960</button>
            </div>
            <p id="dimensions"></p>
            <video autoplay></video>
            <script src="js/getUserMedia_constraints.js"></script>
        </div>
    </body>
</html>